[henkvdg]

Thanks Adam,

It works, but ...

1) There are to many screen refreshes. 3 for a next page
2) The complete screen refreshes every minute. Only the time display should or leave it just out. Only refresh time at a new page, or use partial write.
It is possible to switch the time display off - although it seems that the refreshing goes on every minute.
3) If I use a smaller font, the time display font stays big and writes over the booktext. That is solved by reducing the font size for the page numbers.